Ongoing injuries prevent Juan Martin del Potro from returning to New York this year.
The Greek interrupted the match to address a buzzing fan in Cincinnati.
The 2014 champion will miss his favorite major.
One of tennis' fastest players shows a rare hands-on skill.
The Frenchman says being an elite, showstopping athlete is not all about natural talent.
The 38-year-old is a two-time US Open quarterfinalist.
The pair of former World No.1s will play the main draw at Flushing Meadows, which begins on August 28.
